Dual element passively athemalized infrared imaging systems
US9007683B2 · kind B2 · utility
4Cited by
5References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 20, 2012 |
| Grant date | Apr 14, 2015 |
| Priority date | — |
| Expiry date | Jan 20, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1052
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A passively athermalized infrared imaging system includes an object side meniscus lens that forms at least one aspheric surface, and an image side meniscus lens that forms two aspheric surfaces. Each of the meniscus lenses are formed of a material selected from the group consisting of a chalcogenide glass, germanium, silicon, gallium arsenide, zinc selenide and glass. An optical power of the image side meniscus lens is at least 1.6 times an optical power of the object side meniscus lens such that an effective focus position of the imaging system is athermalized over a range of 0 to +40 degrees Celsius.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.